[PATCH 1/6] nvme-mpath: No need to protect req->bio with requeue_lock

[Sagi Grimberg]

requeue_lock protects the retry_list, no need to hold it while
iterating request bios.

Signed-off-by: Sagi Grimberg <sagi at grimberg.me>
---
 drivers/nvme/host/multipath.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 9b9a657fa330..b5501217303c 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -164,9 +164,10 @@ void nvme_failover_req(struct request *req)
 		queue_work(nvme_wq, &ns->ctrl->ana_work);
 	}
 
-	spin_lock_irqsave(&ns->head->requeue_lock, flags);
 	for (bio = req->bio; bio; bio = bio->bi_next)
 		bio_set_dev(bio, ns->head->disk->part0);
+
+	spin_lock_irqsave(&ns->head->requeue_lock, flags);
 	blk_steal_bios(&ns->head->requeue_list, req);
 	spin_unlock_irqrestore(&ns->head->requeue_lock, flags);
 
-- 
2.43.0